Fine coal and ore separator.



L M. DRAPER.

FINE COAL AND ORE SEPARATOR.

APPLICATION FILED mm, 1914.

Patented A115. 24, 1915.

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COLUMBIA PLANDGRAPH co.,\vAsl-11NGT0N, n. c.

Patented Aug. 24, 1915.

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J. M. DRAPER.

FINE COAL AND ORE SEPARATOR- APPLICATION FILED APR. 4. 1914.

1,151,448. Patented Aug. 24, 1915.

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JOHN MARRIOTT DRAPER, F MANCHESTER, ENG-LAND.

TINECOAL AND ORE SEPABATOB.

Application filed April 4, 1914. Serial No. 829,581.

To all whom it may concern Be it known that I, J 011x MARRIOTT Dnarnn, acitizen of the United States of America, residing at Curzon Buildings,38 King street west, Manchester, England, have invented new and usefulImprovements in Fine Coal and Ore Separators, of which the following isa specification.

This invention relates to an improved con-- struction of apparatus forseparating fine from coarse materials such as is employed in thetreatment of coal and ores which are subjected to the pulsating actionof a liquid produced through the perforated bottom of a separator box toone end of which such material is supplied, and "along which bottom ittravels and is delivered at the opposite end of the box, the Waterremoving the fine portions therefrom in its passage through theperforations.

The movement of the water through the perforated bottom of the separatorbox will be produced in the known manner either by a plunger acting on aportion of the surface of the liquid or by imparting a jigging I motionto'the separator box inthe liquid in fee which same is immersed.

The fine material removed by the suction action of the water in itsdownward passage through the perforated bottom of the separator box willconsist of an admixture of fine dirt and finely divided particles of thematerial being treated, which latter it is the object of the presentinvention to separate and to recover. h

A suitablemanner of carrying my inven- 3 tion into eifect is illustratedin the accompanying drawings as applied to a coalseparater-or washer,in'which a gigg ng move 'ment is imparted "to'thebox inwhich thematerial is treated. I i

In these drawings Figure 1' is a longitudinal section of the improvedseparator or end of the box as it passes under gate I and Specificationof Letters Eatent. Pat erned Aug, 24, 1915,

travels along to the point of delivery over the sill O at the front endof such box,

' causes same to separate by gravity according to density.

The bottom H of box B is preferably inclined toward the point ofdelivery as shown in order to facilitate the travel of the mate rialover same.

Beneath the primary perforated bottom H the box B is formed with asecondary perforated bottom J with an intervening space K constituting achamber on the fioor of which a layer of stone chips is spread to adepth of 2 or 3 inches, but with sufficient clearance above the top toenable the chips to rise and fall under the action of the water in itspassage through the secondary bottom J and exercise a controllingvalvular action over the perforations therein.

The perforations of the secondary bottom J will be larger than those ofthe primary bottom H.

As the primary bottom H of box B is preferably inclined, while thesecondary bottom J has to occupy a horizontal position, in order thattoo great a depth may not have to be allowed over the chips at the innerend, such secondary bottom J may be formedon two or more levels orplanes constitutingsteps as shown.

On the downward stroke of the box or' pan 13 water enters first throughthe perforations of secondary bottom J and passing up through the stonelayer and thence through the finer perforations of the primary bottom H,effects the separation of I the material contained in the box or panaccording to the relative specific gravities thereof.

on the upward stroke a strong suction action will take place, whichfirst operating through the large lower perforations of the secondarybottom J has the result of drawing the stone chips over suchperforations so as topractically close same.

This suction action also obtains through the smaller perforations of theprimary bottom H, whereby part of the fine material is drawn throughinto the intermediate chamber K between bottoms H and J. Owing to theearlier closing'of the perforations in i the secondary bottom J thedownward suction action experiences a check'between the two bottoms Hand J, whereby the heavier particles only of the fines are allowed tosettle or pass downward through bottom J into the tank below, thelighter material remaining in suspension between the two bottoms andpassing along toward the delivery end being thuslargely removed as thematerial passes along the separator box B forward, a point is reachedwhere the product passing through the secondary bottom is wholly ormainly light fines or coal, which'is caused to pass to a separatechuteand can be conveyed back to the box B for rewashing if.

desired or forwarded direct to washed coal delivery. For this purposethe feed end of the box B is situated over the chute l formed in tank Aand which delivers int'o the elevator arranged on the left hand side ofthe machine (Fig; 3), and which disposes of the heavy finespassing outthrough such end of the secondary bottom J, while the remaining orforward portion of bottom J is situated over a chute 2,.for'med in saidtank A and which receives the light fines or coal passing throughsaidbottom and delivers it to anelevator on the righthand' side of themachine (Fig. 3), which" either delivers it from the machine orraisesjit to a chute 5 which conveys it backto box B for rewashing ifdesired. I

In order to determine the point of separation of delivery of the heavyandthe light fines into their respective chutes 1 and 2 an adjustablegate or deflector E is pivoted on a fixed division board'M andthroughrod I N and a crank connection can be adjusted so as to divertthe material passing through the bottom of box B to one side or other,and

' consequently determine accurately the point where the delivery tochute 2 is tostart;

, i When the material to be treated contains only a small proportion offines which are liable to be removed through the perforated bottom ofbox B, but from whichit is desirableto recover a valuable portion, onlya portion of the width of such box'need be fitted with a secondaryperforated bottom, the remaining 'portion having a single or primaryperforated bottom only; Such a construction is represented in the plan,shown in Fig.5 of-thedrawings, where the box 13 is divided by alongitudinal partition X, the material to be treated being delivered tothe compartment Y ofthe box on one side of such partition, which isprovided with materials either in the direction of thedethe usual orprimary perforated bottom only, the whole of'the fines passing throughwhich single bottom are conveyed back and delivered to the compartment Zon the other side of partition X,which isprovided with both til-primaryand a secondary perforated bottom which ,eifect the separation of theheavy and the lighter fines in thevmanner hereinbefore described. p

In order to effect the supply of stone chips to the chamber Kbetween theprimary and secondary perforated bottoms'H and J of box B, pockets G areprovided preferably. at the opposite ends of the box as shown, and whichare open at top and at'bottom open into such chamber K, so that asuitable supply of chips dropped into such pockets will under thejigging action of the box in the water beimmediately distributed inalayer ofuniform depth overthe perforationsof the secondary bottom J onwhich they rest. A fresh' amount of chips may beintroduced through suchpockets from timeto time to replace the loss 0002asioned by abrasion anda rod introducedinto one of such pockets will enable the desired depthof the layer to be readily gaged.

' The primary perforated bottom H; of box f B terminates before'the sill0 so as 'to leave an opening P, beneath which a cradle C is pivoted,.andis connected by .an arm Rc to a weighted rod 8 The cradleC'is directedtoward the feed end of themachine, and the heavy material which passesthrough open- 1 ing P accumulates thereon until overcoming the weightacting on rod .8, it will cause. cradle C to fall and bedischargedtoward the feed end of the machine into; chute 3, the i bottomof which delivers to the same elevator as that with which the chute 1 ofthe heavy fines communicates, soithat the same elevatorvserves todeliver boththe heavy fines and the heavy separated material togetherfrom the machine.

The light separatedmaterial constituting the upper stratum of thematerial at the d elivery end 'ofbox B, as-it accumulatessun mounts theupper edge of sill 0 and falls into chute 4: communicating with theelevaw tor occupying the central portion of the ma chine, and bv-lwhichit is delivered from the machine.

through chute l passesfrom the central elevator casing in the directionshown by the arrows .to trough F which conveys it back to tank A at apointbelow theseparatorbox The water with the separated coal B,thus'establishingthe necessary circulation of thewater and maintainingthe level of the liquid in saidtank.

It has already been proposed tofemploy a pivoted part constituting thebottom of the separator box or acting in conjunction therewith andallowing of thedischarge of heavy perforated bottom, a perforatedbed-supporting bottom beneath the sameand in proximity thereto,comprising sections longitudinally arranged in stepped relation, theperforations of the first mentioned bottom being smaller than those ofthe bed support- 7 ing bottom, the first bottom being adapted toinitially receive the material to be sepa rated, and means for forcingan intermittent current of fluid through the bottoms.

2. A jig box having an elongated inclined perforated bottom, aperforated bed-supporting bottom beneath the same and in proximitythereto, comprising sections lon-' gitudinally arranged in steppedrelation, the

perforations of the first mentioned bottom bei ing smaller than those ofthe bed supporting bottom, the first bottom being adapted to in-'itially receive the material to be separated, and means forforcing anintermittent current of fluid through the bottom, each step portion ofthe bed-supporting bottom being provided With an inlet conduit forbed-material located outside the area ofthe first bottoms.

In testimony whereof Ihave signed my name to this specification in thepresence of two subscribing Witnesses.

JOHNMARRIOTT DRAPER, Witnesses I R. BEETLEs'roNER,

E. C. ,HETHERINGTON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. O.

